Desk with retractable board and retractable board device

ABSTRACT

A desk of the present invention has a plank member with a slot and a retractable board. Two parallel rails are provided in the slot and engaged with the retractable board. The retractable board is moved between a retracted condition and an extended condition. When the retractable board is moved to the retracted condition, the retractable board is located in the slot of the desk, and when the retractable board is moved to the extended condition, the retractable board is moved out of the slot and substantially perpendicular to the plank member.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a device for presentation, and more particularly to a desk with a retractable board and the retractable device.

2. Description of the Related Art

In assembly room, there are a desk a couple of chairs and a white board. People can write on the white board for presentation. The white board usually takes a lot of space that might take the path of walking.

In many companies, there are a couple of assembly rooms bit only have one white board. The white board has to be moved between the rooms that also makes inconvenient.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a desk with a retractable board that take less space of the assembly room.

The secondary objective of the present invention is to provide a retractable board assembly to be mounted on any desk, such that the desk can provide a white board when necessary.

According to the objectives of the primary present invention, a desk of the present invention has a plank member with two parallel rails and a retractable board provided on the rail for movement. The retractable board is moved between a retracted condition and an extended condition. When the retractable board is moved to the retracted condition, the retractable board is located in the desk, and when the retractable board is moved to the extended condition, the retractable board is moved out of the desk and substantially perpendicular to the plank member.

According to the objectives of the secondary present invention, a retractable board device includes a base to be fixed to a desk, on which two rails are mounted. A retractable board is engaged with the rails for movement. The retractable board is moved between a retracted condition and an extended condition. When the retractable board is moved to the retracted condition, the retractable board is located in the base, and when the retractable board is moved to the extended condition, the retractable board is moved out of the base and substantially perpendicular to the base.

10. The retractable board device as defined in claim 9, wherein the base has a plate, on which the rails are provided, and a cover mounted on the plate to mask the rails.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a lateral sectional view of a first preferred embodiment of the present invention;

FIG. 2 is a front view of the first preferred embodiment of the present invention;

FIG. 3 is a top sectional view of the first preferred embodiment of the present invention;

FIG. 4 is a lateral sectional view of the first preferred embodiment of the present invention, showing the movable board being drawn out and turned upwards;

FIG. 5 is a perspective view of a second preferred embodiment of the present invention;

FIG. 6 is a perspective view of a third preferred embodiment of the present invention;

FIG. 7 is a lateral sectional view of a fourth preferred embodiment of the present invention;

FIG. 8 is a lateral sectional view of the fourth preferred embodiment of the present invention, showing the retractable board device being mounted under a desk;

FIG. 9 is a lateral sectional view of the fourth preferred embodiment of the present invention, showing the movable board being drawn out and turned upwards; and

FIG. 10 is a perspective view of a part of the fourth preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 1 to FIG. 5, the first preferred embodiment of the present invention provides a desk 10 having a plank member 12 with a slot 14 on a bottom thereof. The slot is open at the bottom and an edge of the plank member 12 and has two sidewalls 16. Two rails 18 are mounted on the sidewalls 16 respectively.

A retractable board 20 has a base board 22 and a movable board 24 connected together by hinges 26, such that the movable board 24 is tuned relative to the base board 22. A ratchet device 28 is provided between the base board 22 and the movable board 24, such that the movable board 24 can be fixed at any angle. The base board 22 and the movable board 24 have sliding members 30, 31 on opposite edges respectively to be engaged with the rails 18, such that the base board 22 and the movable board 24 can slide along the rails 18.

In a retracted condition, as shown in FIG. 1 and FIG. 3, the movable board 24 is turned 180 degrees relative to the base board 22 and both of the base board 22 and the movable board 24 are received in the slot 14 of the plank member 12. In use, the movable board 24 is drawn out of the slot 14 and disengaged with the rails 18, and the base board 22 has a portion still received in the slot 14 and engaged with the rails 18. Now, the movable board 24 is turned upwards about 90 degrees to an extended condition, and the ratchet will fix the movable board 24 at the extended condition, as shown in FIG. 4.

In the retracted condition, the desk 10 of the present invention is as same as the normal desk. In the extended condition, the desk 10 of the present invention has the vertical movable board 24 at an edge of the desk to be used as white board, show board, screen (for projector) and the like.

As shown in FIG. 5, a desk 32 of the second preferred embodiment of the preset invention, which is similar to the desk 10 of the first preferred embodiment, except that a movable board 34 is pivoted with two extended boards 36 on opposite edges along a horizontal orientation. In a folding condition, the extended boards 36 are turned inwards and rested on the movable board 36. In an extended condition, the extended boards 36 are turned outwards for 180 degrees, such that we will have the board with greater area on the desk 32.

FIG. 6 shows a desk 38 of the third preferred embodiment of the preset invention, which a movable board 40 has an extended board 42 pivoted on a top thereof. In a folding condition, the extended board 42 is turned downwards and rested on the movable board 40. In an extended condition, the extended board 42 are turned upwards for 180 degrees, such that we will have the board with greater area on the desk 38.

As shown in FIG. 7 to FIG. 9, the fourth preferred embodiment of the present invention provides a retractable board device 44. The retractable board device 44 has a base 46 and a retractable board 54. The base 46 includes a plate 48, on which two parallel rails 52, and a cover 50 to mask the rails 52. The retractable board 54 has a base board 56 and a movable board 58. The base board 56 and the movable board 58 have sliding members 60, 61 respectively to be engaged with the rails 52, such that the base board 56 and the movable board 58 can slide along the rails 52.

The plate 48 of the base 46 is provided with bores 62 to fix the retractable board device 44 of the present invention on a bottom of a plank 66 of a desk 64 by screws. As same as above, the movable board 58 may be drawn out and turned upwards to form a vertical board at an edge of the desk 64.

As shown in FIG. 10, the base board 56 has a fixed portion 68 with two holes 70, 72, and the movable board 74 has a hole 74. While the movable board 58 is turned downwards and upwards, the hole 74 of the movable board 74 is aligned with the holes 70, 72 of the base board 56 respectively, such that a pin 76 can be inserted into the holes to fix the movable board 58 in horizontal condition and vertical condition. 

1. A desk having a plank member with two parallel rail and a retractable board provided on the rail for movement, wherein the retractable board is moved between a retracted condition, in which the retractable board is located in the desk, and an extended condition, in which the retractable board is moved out of the desk and substantially perpendicular to the plank member.
 2. The desk as defined in claim 1, wherein the plank member has a slot with two sidewalls, on which the rails are provided, and the retractable board is received in the slot in the retractable condition.
 3. The desk as defined in claim 1, wherein the retractable board has a base board with sliding member engaged with the rails for movement and a movable board pivoted on an end of the base board to be turned to the extended condition.
 4. The desk as defined in claim 3, further comprising means for fixing the movable board at the extended condition.
 5. The desk as defined in claim 4, wherein a ratchet is provided between the base board and the movable board.
 6. The desk as defined in claim 4, wherein the base board has a hole, and the movable board has a hole whereby the hole of the movable board is aligned with the hole of the base board when the movable board is moved to the extended condition to insert a pin in the holes.
 7. The desk as defined in claim 1, wherein the retractable board is pivoted with an extended board on an edge along a horizontal direction.
 8. The desk as defined in claim 1, wherein the retractable board is pivoted with an extended board on an edge along a perpendicular direction.
 9. A retractable board device, comprising: a base to be fixed to a desk; two rails mounted on the base; a retractable board engaged with the rails for movement, wherein the retractable board is moved between a retracted condition, in which the retractable board is located in the base, and an extended condition, in which the retractable board is moved out of the base and substantially perpendicular to the base.
 10. The retractable board device as defined in claim 9, wherein the base has a plate, on which the rails are provided, and a cover mounted on the plate to mask the rails.
 11. The retractable board device as defined in claim 9, wherein the retractable board has a base board and a movable board pivoted on the base board to be turned relative to the base board.
 12. The retractable board device as defined in claim 9, further comprising means for fixing the movable board at the extended condition.
 13. The retractable board device as defined in claim 12, wherein a ratchet is provided between the base board and the movable board.
 14. The retractable board device as defined in claim 12, wherein the base board has a hole, and the movable board has a hole whereby the hole of the movable board is aligned with the hole of the base board when the movable board is moved to the extended condition to insert a pin in the holes.
 15. The retractable board device as defined in claim 9, wherein the retractable board is pivoted with an extended board on an edge along a horizontal direction.
 16. The retractable board device as defined in claim 9, wherein the retractable board is pivoted with an extended board on an edge along a perpendicular direction. 